摘要
研究了一种采用蝶形液晶开关获得柱透镜式定向背光横向平顶光束的原理和方法,在广义惠更斯-菲涅耳衍射积分理论的基础上,推导出以蝶形液晶开关单元为光源的光束经柱透镜后的衍射光场分布表达式;将蝶形液晶开关单元置于柱透镜的物方焦平面上,利用MATLAB编程模拟不同焦距柱透镜下的横向光场能量分布曲线,并分析了蝶形参数对横向光场能量分布的影响。结果表明,随着蝶形参数减小,横向衍射光场能量均匀度先增大后减小,存在一个蝶形参数值可使能量均匀度达到最大值。
We study the principle and method of obtaining cylindrical lens type directional backlight flattop beam by using a butterfly liquid crystal switch. Based on the generalized Huygens-Fresnel diffraction integral theory, we deduce the diffraction field distribution expression of beam after passing through cylindrical lens, and the butterfly liquid crystal switch unit is the light source of the beam. Placing the butterfly liquid crystal switch unit on the cube focal plane of the cylindrical lens, we simulate transverse optical field energy distribution curves at cylindrical lens with different focal lengths by MATLAB programming, and analyze the influence of butterfly parameter on the transverse optical field energy distribution. The results show that the energy uniformity of the transverse diffraction field energy firstly increases and then decreases with the reduction of the butterfly parameter, thus there exists a butterfly parameter that can maximize the energy uniformity.
出处
《激光与光电子学进展》
CSCD
北大核心
2017年第11期282-290,共9页
Laser & Optoelectronics Progress
基金
福建省高校产学合作科技重大项目(2016H6016)
华侨大学研究生科研创新能力培育项目(1511301001)
关键词
衍射
平顶光束
蝶形液晶开关
柱透镜
自由立体显示
衍射理论
diffraction
flattop beam
butterfly liquid crystal switch
cylindrical lens
autostereoseopic display
diffraction theory
